With the increasingly strict environmental regulations, green Printing consumables are gradually being sought after by major printing consumable suppliers, and all countries in the world are vigorously developing environmentally friendly products such as alcohol-free fountain solutions and water-based inks. Among them, the alcohol-free dampening solution is being accepted by printing companies by virtue of cost saving, high safety index and environmental protection, and gradually replaces the status of traditional alcohol dampening solution. In this article, the author will talk about some understanding of alcohol-free dampening solution, and hope to help the peers. The necessity of alcohol-free fountain solution in In dampening solution for offset printing , the role of alcohol (isopropyl alcohol, IPA) is mainly to reduce the surface tension of the dampening solution, so that the dampening solution becomes more "wet" to facilitate its expansion in the hydrophilic portion of the printing plate; Increase the viscosity of the dampening solution; disinfect the dampening solution. However, the problems caused by alcohol are also obvious: rapid evaporation, high waste; high price; flammable and explosive; With the use of alcohol-free fountain solution, not only the function of the alcohol fountain solution will be retained, but also the problems it brings will be overcome, saving money and environmental protection, and the company, society and laborers will benefit. It is worth mentioning that alcohol is a thinner that actively invades the ink, which will make the ink tarnish and affect the printing color. Without alcohol, there is no such problem, the ink dosage will be reduced, and the dots will be more precise. Prints will also print faster after printing. Some understanding of alcohol-free fountain solution Alcohol-free dampening solution does have advantages in actual use, and it is worth promoting. However, in the specific use process, it is necessary to understand the corresponding use methods and precautions, otherwise it will not only play an advantage, but may even bring trouble. Here are a few things that printing business executives and operators must be aware of before using alcohol-free fountain solutions. 1. The attitude of the leadership is very important The green printing road will go sooner or later, and the standard of green printing will only get higher and higher, and it will not be as good as it is now. This can accumulate experience and go ahead. This must be recognized by the printing industry leadership. In addition, in the process of promoting the use of alcohol-free fountain solution, the attitude of the leadership is also very important, because when the alcohol-free fountain solution is first used, the operator is not suitable for the process conversion, more or less will encounter When it comes to the problem, there will always be some complaints. If the leadership retreats, then it will end in failure. Therefore, it is necessary to reiterate: the entire process of alcohol removal, the active participation of the printing captain and the operators is very important, and sometimes even the key to success or failure. The printing enterprise leadership should let everyone fully understand the meaning of process conversion and mobilize everyone to use alcohol-free. The enthusiasm of dampening solution. 2. Alcohol-free fountain solution has certain requirements for offset presses In the process of transferring the alcohol-free fountain solution in the water system of the offset printing machine, there are certain requirements for the stability of the waterway and the surface condition of the rubber roller. This is because the viscosity of the alcohol-free fountain solution has no high viscosity of the alcohol fountain solution. Therefore, the water film transmitted on the rubber roller is relatively thin. When the pressure between the rubber rollers is uneven, the surface of the rubber roller is broken, or the concentricity of the rubber roller is insufficient, the transmission of the alcohol-free fountain solution may be insufficient or partially insufficient. Therefore, it is not suitable for alcohol-free fountain solutions for offset presses that have been used for many years and lack maintenance. 3. Adjust and clean the offset press before using the alcohol-free fountain solution For offset presses that can use alcohol-free fountain solutions, the following issues must be observed before use.
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